A new post-emergence sugar beet herbicide combines contact and residual activity against a range of broadleaved and grass weeds.
Launched by Bayer, Betanal Tandem contains ethofumesate and phenmedipham in a suspension concentrate. It is authorised for use in sugar beet, fodder beet and mangels, says Lizzie Carr-Archer, the company’s root crop campaign manager.
“Betanal Tandem offers greater ease of use over straights and is approved for use with Dow Shield 400 (clopyralid) and Goltix 70 SC (metamitron) which will help to extend its flexibility in tackling volunteer potatoes and mayweed,” she says.
Weed control in sugar beet has added significance for 2021 after Defra granted permission for neonicotinoid-treated seed. A condition of the permission means flowering weeds in and around sugar beet crops must be controlled to protect beneficial insects.
“Trials indicate that Betanal Tandem delivers strong control when applied with an adjuvant oil such as Mero, a methylated rape oil, with the first application timed for when the majority of the crop plants have reached fully expanded cotyledon stage,” says Mrs Carr-Archer.
“Betanal Tandem has outperformed other two-way formulations in trials, most notably on fat-hen, black-bindweed, small nettle and annual mercury with a clear uplift in efficacy compared with Powertwin. As a result, we expect Betanal Tandem to be the herbicide of choice for 2021.”